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/** @license React v0.9.0
 * react-refresh-runtime.development.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';

if (process.env.NODE_ENV !== "production") {
  (function() {
'use strict';

// ATTENTION
// When adding new symbols to this file,
// Please consider also adding to 'react-devtools-shared/src/backend/ReactSymbols'
// The Symbol used to tag the ReactElement-like types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var REACT_ELEMENT_TYPE = 0xeac7;
var REACT_PORTAL_TYPE = 0xeaca;
var REACT_FRAGMENT_TYPE = 0xeacb;
var REACT_STRICT_MODE_TYPE = 0xeacc;
var REACT_PROFILER_TYPE = 0xead2;
var REACT_PROVIDER_TYPE = 0xeacd;
var REACT_CONTEXT_TYPE = 0xeace;
var REACT_FORWARD_REF_TYPE = 0xead0;
var REACT_SUSPENSE_TYPE = 0xead1;
var REACT_SUSPENSE_LIST_TYPE = 0xead8;
var REACT_MEMO_TYPE = 0xead3;
var REACT_LAZY_TYPE = 0xead4;
var REACT_BLOCK_TYPE = 0xead9;
var REACT_SERVER_BLOCK_TYPE = 0xeada;
var REACT_FUNDAMENTAL_TYPE = 0xead5;
var REACT_SCOPE_TYPE = 0xead7;
var REACT_OPAQUE_ID_TYPE = 0xeae0;
var REACT_DEBUG_TRACING_MODE_TYPE = 0xeae1;
var REACT_OFFSCREEN_TYPE = 0xeae2;
var REACT_LEGACY_HIDDEN_TYPE = 0xeae3;

if (typeof Symbol === 'function' && Symbol.for) {
  var symbolFor = Symbol.for;
  REACT_ELEMENT_TYPE = symbolFor('react.element');
  REACT_PORTAL_TYPE = symbolFor('react.portal');
  REACT_FRAGMENT_TYPE = symbolFor('react.fragment');
  REACT_STRICT_MODE_TYPE = symbolFor('react.strict_mode');
  REACT_PROFILER_TYPE = symbolFor('react.profiler');
  REACT_PROVIDER_TYPE = symbolFor('react.provider');
  REACT_CONTEXT_TYPE = symbolFor('react.context');
  REACT_FORWARD_REF_TYPE = symbolFor('react.forward_ref');
  REACT_SUSPENSE_TYPE = symbolFor('react.suspense');
  REACT_SUSPENSE_LIST_TYPE = symbolFor('react.suspense_list');
  REACT_MEMO_TYPE = symbolFor('react.memo');
  REACT_LAZY_TYPE = symbolFor('react.lazy');
  REACT_BLOCK_TYPE = symbolFor('react.block');
  REACT_SERVER_BLOCK_TYPE = symbolFor('react.server.block');
  REACT_FUNDAMENTAL_TYPE = symbolFor('react.fundamental');
  REACT_SCOPE_TYPE = symbolFor('react.scope');
  REACT_OPAQUE_ID_TYPE = symbolFor('react.opaque.id');
  REACT_DEBUG_TRACING_MODE_TYPE = symbolFor('react.debug_trace_mode');
  REACT_OFFSCREEN_TYPE = symbolFor('react.offscreen');
  REACT_LEGACY_HIDDEN_TYPE = symbolFor('react.legacy_hidden');
}

var PossiblyWeakMap = typeof WeakMap === 'function' ? WeakMap : Map; // We never remove these associations.
// It's OK to reference families, but use WeakMap/Set for types.

var allFamiliesByID = new Map();
var allFamiliesByType = new PossiblyWeakMap();
var allSignaturesByType = new PossiblyWeakMap(); // This WeakMap is read by React, so we only put families
// that have actually been edited here. This keeps checks fast.
// $FlowIssue

var updatedFamiliesByType = new PossiblyWeakMap(); // This is cleared on every performReactRefresh() call.
// It is an array of [Family, NextType] tuples.

var pendingUpdates = []; // This is injected by the renderer via DevTools global hook.

var helpersByRendererID = new Map();
var helpersByRoot = new Map(); // We keep track of mounted roots so we can schedule updates.

var mountedRoots = new Set(); // If a root captures an error, we remember it so we can retry on edit.

var failedRoots = new Set(); // In environments that support WeakMap, we also remember the last element for every root.
// It needs to be weak because we do this even for roots that failed to mount.
// If there is no WeakMap, we won't attempt to do retrying.
// $FlowIssue

var rootElements = // $FlowIssue
typeof WeakMap === 'function' ? new WeakMap() : null;
var isPerformingRefresh = false;

function computeFullKey(signature) {
  if (signature.fullKey !== null) {
    return signature.fullKey;
  }

  var fullKey = signature.ownKey;
  var hooks;

  try {
    hooks = signature.getCustomHooks();
  } catch (err) {
    // This can happen in an edge case, e.g. if expression like Foo.useSomething
    // depends on Foo which is lazily initialized during rendering.
    // In that case just assume we'll have to remount.
    signature.forceReset = true;
    signature.fullKey = fullKey;
    return fullKey;
  }

  for (var i = 0; i < hooks.length; i++) {
    var hook = hooks[i];

    if (typeof hook !== 'function') {
      // Something's wrong. Assume we need to remount.
      signature.forceReset = true;
      signature.fullKey = fullKey;
      return fullKey;
    }

    var nestedHookSignature = allSignaturesByType.get(hook);

    if (nestedHookSignature === undefined) {
      // No signature means Hook wasn't in the source code, e.g. in a library.
      // We'll skip it because we can assume it won't change during this session.
      continue;
    }

    var nestedHookKey = computeFullKey(nestedHookSignature);

    if (nestedHookSignature.forceReset) {
      signature.forceReset = true;
    }

    fullKey += '\n---\n' + nestedHookKey;
  }

  signature.fullKey = fullKey;
  return fullKey;
}

function haveEqualSignatures(prevType, nextType) {
  var prevSignature = allSignaturesByType.get(prevType);
  var nextSignature = allSignaturesByType.get(nextType);

  if (prevSignature === undefined && nextSignature === undefined) {
    return true;
  }

  if (prevSignature === undefined || nextSignature === undefined) {
    return false;
  }

  if (computeFullKey(prevSignature) !== computeFullKey(nextSignature)) {
    return false;
  }

  if (nextSignature.forceReset) {
    return false;
  }

  return true;
}

function isReactClass(type) {
  return type.prototype && type.prototype.isReactComponent;
}

function canPreserveStateBetween(prevType, nextType) {
  if (isReactClass(prevType) || isReactClass(nextType)) {
    return false;
  }

  if (haveEqualSignatures(prevType, nextType)) {
    return true;
  }

  return false;
}

function resolveFamily(type) {
  // Only check updated types to keep lookups fast.
  return updatedFamiliesByType.get(type);
} // If we didn't care about IE11, we could use new Map/Set(iterable).


function cloneMap(map) {
  var clone = new Map();
  map.forEach(function (value, key) {
    clone.set(key, value);
  });
  return clone;
}

function cloneSet(set) {
  var clone = new Set();
  set.forEach(function (value) {
    clone.add(value);
  });
  return clone;
}

function performReactRefresh() {

  if (pendingUpdates.length === 0) {
    return null;
  }

  if (isPerformingRefresh) {
    return null;
  }

  isPerformingRefresh = true;

  try {
    var staleFamilies = new Set();
    var updatedFamilies = new Set();
    var updates = pendingUpdates;
    pendingUpdates = [];
    updates.forEach(function (_ref) {
      var family = _ref[0],
          nextType = _ref[1];
      // Now that we got a real edit, we can create associations
      // that will be read by the React reconciler.
      var prevType = family.current;
      updatedFamiliesByType.set(prevType, family);
      updatedFamiliesByType.set(nextType, family);
      family.current = nextType; // Determine whether this should be a re-render or a re-mount.

      if (canPreserveStateBetween(prevType, nextType)) {
        updatedFamilies.add(family);
      } else {
        staleFamilies.add(family);
      }
    }); // TODO: rename these fields to something more meaningful.

    var update = {
      updatedFamilies: updatedFamilies,
      // Families that will re-render preserving state
      staleFamilies: staleFamilies // Families that will be remounted

    };
    helpersByRendererID.forEach(function (helpers) {
      // Even if there are no roots, set the handler on first update.
      // This ensures that if *new* roots are mounted, they'll use the resolve handler.
      helpers.setRefreshHandler(resolveFamily);
    });
    var didError = false;
    var firstError = null; // We snapshot maps and sets that are mutated during commits.
    // If we don't do this, there is a risk they will be mutated while
    // we iterate over them. For example, trying to recover a failed root
    // may cause another root to be added to the failed list -- an infinite loop.

    var failedRootsSnapshot = cloneSet(failedRoots);
    var mountedRootsSnapshot = cloneSet(mountedRoots);
    var helpersByRootSnapshot = cloneMap(helpersByRoot);
    failedRootsSnapshot.forEach(function (root) {
      var helpers = helpersByRootSnapshot.get(root);

      if (helpers === undefined) {
        throw new Error('Could not find helpers for a root. This is a bug in React Refresh.');
      }

      if (!failedRoots.has(root)) {// No longer failed.
      }

      if (rootElements === null) {
        return;
      }

      if (!rootElements.has(root)) {
        return;
      }

      var element = rootElements.get(root);

      try {
        helpers.scheduleRoot(root, element);
      } catch (err) {
        if (!didError) {
          didError = true;
          firstError = err;
        } // Keep trying other roots.

      }
    });
    mountedRootsSnapshot.forEach(function (root) {
      var helpers = helpersByRootSnapshot.get(root);

      if (helpers === undefined) {
        throw new Error('Could not find helpers for a root. This is a bug in React Refresh.');
      }

      if (!mountedRoots.has(root)) {// No longer mounted.
      }

      try {
        helpers.scheduleRefresh(root, update);
      } catch (err) {
        if (!didError) {
          didError = true;
          firstError = err;
        } // Keep trying other roots.

      }
    });

    if (didError) {
      throw firstError;
    }

    return update;
  } finally {
    isPerformingRefresh = false;
  }
}
function register(type, id) {
  {
    if (type === null) {
      return;
    }

    if (typeof type !== 'function' && typeof type !== 'object') {
      return;
    } // This can happen in an edge case, e.g. if we register
    // return value of a HOC but it returns a cached component.
    // Ignore anything but the first registration for each type.


    if (allFamiliesByType.has(type)) {
      return;
    } // Create family or remember to update it.
    // None of this bookkeeping affects reconciliation
    // until the first performReactRefresh() call above.


    var family = allFamiliesByID.get(id);

    if (family === undefined) {
      family = {
        current: type
      };
      allFamiliesByID.set(id, family);
    } else {
      pendingUpdates.push([family, type]);
    }

    allFamiliesByType.set(type, family); // Visit inner types because we might not have registered them.

    if (typeof type === 'object' && type !== null) {
      switch (type.$$typeof) {
        case REACT_FORWARD_REF_TYPE:
          register(type.render, id + '$render');
          break;

        case REACT_MEMO_TYPE:
          register(type.type, id + '$type');
          break;
      }
    }
  }
}
function setSignature(type, key) {
  var forceReset = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
  var getCustomHooks = arguments.length > 3 ? arguments[3] : undefined;

  {
    allSignaturesByType.set(type, {
      forceReset: forceReset,
      ownKey: key,
      fullKey: null,
      getCustomHooks: getCustomHooks || function () {
        return [];
      }
    });
  }
} // This is lazily called during first render for a type.
// It captures Hook list at that time so inline requires don't break comparisons.

function collectCustomHooksForSignature(type) {
  {
    var signature = allSignaturesByType.get(type);

    if (signature !== undefined) {
      computeFullKey(signature);
    }
  }
}
function getFamilyByID(id) {
  {
    return allFamiliesByID.get(id);
  }
}
function getFamilyByType(type) {
  {
    return allFamiliesByType.get(type);
  }
}
function findAffectedHostInstances(families) {
  {
    var affectedInstances = new Set();
    mountedRoots.forEach(function (root) {
      var helpers = helpersByRoot.get(root);

      if (helpers === undefined) {
        throw new Error('Could not find helpers for a root. This is a bug in React Refresh.');
      }

      var instancesForRoot = helpers.findHostInstancesForRefresh(root, families);
      instancesForRoot.forEach(function (inst) {
        affectedInstances.add(inst);
      });
    });
    return affectedInstances;
  }
}
function injectIntoGlobalHook(globalObject) {
  {
    // For React Native, the global hook will be set up by require('react-devtools-core').
    // That code will run before us. So we need to monkeypatch functions on existing hook.
    // For React Web, the global hook will be set up by the extension.
    // This will also run before us.
    var hook = globalObject.__REACT_DEVTOOLS_GLOBAL_HOOK__;

    if (hook === undefined) {
      // However, if there is no DevTools extension, we'll need to set up the global hook ourselves.
      // Note that in this case it's important that renderer code runs *after* this method call.
      // Otherwise, the renderer will think that there is no global hook, and won't do the injection.
      var nextID = 0;
      globalObject.__REACT_DEVTOOLS_GLOBAL_HOOK__ = hook = {
        renderers: new Map(),
        supportsFiber: true,
        inject: function (injected) {
          return nextID++;
        },
        onScheduleFiberRoot: function (id, root, children) {},
        onCommitFiberRoot: function (id, root, maybePriorityLevel, didError) {},
        onCommitFiberUnmount: function () {}
      };
    } // Here, we just want to get a reference to scheduleRefresh.


    var oldInject = hook.inject;

    hook.inject = function (injected) {
      var id = oldInject.apply(this, arguments);

      if (typeof injected.scheduleRefresh === 'function' && typeof injected.setRefreshHandler === 'function') {
        // This version supports React Refresh.
        helpersByRendererID.set(id, injected);
      }

      return id;
    }; // Do the same for any already injected roots.
    // This is useful if ReactDOM has already been initialized.
    // https://github.com/facebook/react/issues/17626


    hook.renderers.forEach(function (injected, id) {
      if (typeof injected.scheduleRefresh === 'function' && typeof injected.setRefreshHandler === 'function') {
        // This version supports React Refresh.
        helpersByRendererID.set(id, injected);
      }
    }); // We also want to track currently mounted roots.

    var oldOnCommitFiberRoot = hook.onCommitFiberRoot;

    var oldOnScheduleFiberRoot = hook.onScheduleFiberRoot || function () {};

    hook.onScheduleFiberRoot = function (id, root, children) {
      if (!isPerformingRefresh) {
        // If it was intentionally scheduled, don't attempt to restore.
        // This includes intentionally scheduled unmounts.
        failedRoots.delete(root);

        if (rootElements !== null) {
          rootElements.set(root, children);
        }
      }

      return oldOnScheduleFiberRoot.apply(this, arguments);
    };

    hook.onCommitFiberRoot = function (id, root, maybePriorityLevel, didError) {
      var helpers = helpersByRendererID.get(id);

      if (helpers === undefined) {
        return;
      }

      helpersByRoot.set(root, helpers);
      var current = root.current;
      var alternate = current.alternate; // We need to determine whether this root has just (un)mounted.
      // This logic is copy-pasted from similar logic in the DevTools backend.
      // If this breaks with some refactoring, you'll want to update DevTools too.

      if (alternate !== null) {
        var wasMounted = alternate.memoizedState != null && alternate.memoizedState.element != null;
        var isMounted = current.memoizedState != null && current.memoizedState.element != null;

        if (!wasMounted && isMounted) {
          // Mount a new root.
          mountedRoots.add(root);
          failedRoots.delete(root);
        } else if (wasMounted && isMounted) ; else if (wasMounted && !isMounted) {
          // Unmount an existing root.
          mountedRoots.delete(root);

          if (didError) {
            // We'll remount it on future edits.
            failedRoots.add(root);
          } else {
            helpersByRoot.delete(root);
          }
        } else if (!wasMounted && !isMounted) {
          if (didError) {
            // We'll remount it on future edits.
            failedRoots.add(root);
          }
        }
      } else {
        // Mount a new root.
        mountedRoots.add(root);
      }

      return oldOnCommitFiberRoot.apply(this, arguments);
    };
  }
}
function hasUnrecoverableErrors() {
  // TODO: delete this after removing dependency in RN.
  return false;
} // Exposed for testing.

function _getMountedRootCount() {
  {
    return mountedRoots.size;
  }
} // This is a wrapper over more primitive functions for setting signature.
// Signatures let us decide whether the Hook order has changed on refresh.
//
// This function is intended to be used as a transform target, e.g.:
// var _s = createSignatureFunctionForTransform()
//
// function Hello() {
//   const [foo, setFoo] = useState(0);
//   const value = useCustomHook();
//   _s(); /* Second call triggers collecting the custom Hook list.
//          * This doesn't happen during the module evaluation because we
//          * don't want to change the module order with inline requires.
//          * Next calls are noops. */
//   return <h1>Hi</h1>;
// }
//
// /* First call specifies the signature: */
// _s(
//   Hello,
//   'useState{[foo, setFoo]}(0)',
//   () => [useCustomHook], /* Lazy to avoid triggering inline requires */
// );

function createSignatureFunctionForTransform() {
  {
    // We'll fill in the signature in two steps.
    // First, we'll know the signature itself. This happens outside the component.
    // Then, we'll know the references to custom Hooks. This happens inside the component.
    // After that, the returned function will be a fast path no-op.
    var status = 'needsSignature';
    var savedType;
    var hasCustomHooks;
    return function (type, key, forceReset, getCustomHooks) {
      switch (status) {
        case 'needsSignature':
          if (type !== undefined) {
            // If we received an argument, this is the initial registration call.
            savedType = type;
            hasCustomHooks = typeof getCustomHooks === 'function';
            setSignature(type, key, forceReset, getCustomHooks); // The next call we expect is from inside a function, to fill in the custom Hooks.

            status = 'needsCustomHooks';
          }

          break;

        case 'needsCustomHooks':
          if (hasCustomHooks) {
            collectCustomHooksForSignature(savedType);
          }

          status = 'resolved';
          break;
      }

      return type;
    };
  }
}
function isLikelyComponentType(type) {
  {
    switch (typeof type) {
      case 'function':
        {
          // First, deal with classes.
          if (type.prototype != null) {
            if (type.prototype.isReactComponent) {
              // React class.
              return true;
            }

            var ownNames = Object.getOwnPropertyNames(type.prototype);

            if (ownNames.length > 1 || ownNames[0] !== 'constructor') {
              // This looks like a class.
              return false;
            } // eslint-disable-next-line no-proto


            if (type.prototype.__proto__ !== Object.prototype) {
              // It has a superclass.
              return false;
            } // Pass through.
            // This looks like a regular function with empty prototype.

          } // For plain functions and arrows, use name as a heuristic.


          var name = type.name || type.displayName;
          return typeof name === 'string' && /^[A-Z]/.test(name);
        }

      case 'object':
        {
          if (type != null) {
            switch (type.$$typeof) {
              case REACT_FORWARD_REF_TYPE:
              case REACT_MEMO_TYPE:
                // Definitely React components.
                return true;

              default:
                return false;
            }
          }

          return false;
        }

      default:
        {
          return false;
        }
    }
  }
}

exports._getMountedRootCount = _getMountedRootCount;
exports.collectCustomHooksForSignature = collectCustomHooksForSignature;
exports.createSignatureFunctionForTransform = createSignatureFunctionForTransform;
exports.findAffectedHostInstances = findAffectedHostInstances;
exports.getFamilyByID = getFamilyByID;
exports.getFamilyByType = getFamilyByType;
exports.hasUnrecoverableErrors = hasUnrecoverableErrors;
exports.injectIntoGlobalHook = injectIntoGlobalHook;
exports.isLikelyComponentType = isLikelyComponentType;
exports.performReactRefresh = performReactRefresh;
exports.register = register;
exports.setSignature = setSignature;
  })();
}
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